Old Square Body Trucks: A Classic Truck Guide

If you're a truck enthusiast, you've likely heard of or have an affinity for the iconic "square body" trucks. These durable, boxy vehicles from the late 1970s and 1980s represent a golden era of American automotive design and engineering. This guide delves into the world of old square body trucks, providing detailed information about their history, key features, common issues, and restoration tips. Whether you're a seasoned collector or just curious, this article is designed to equip you with the knowledge to appreciate and maintain these vintage trucks.

The History and Evolution of Square Body Trucks

The Birth of the Square Body Era

The square body era generally refers to the Chevrolet and GMC trucks produced from 1973 to 1987. These trucks, officially designated as the "Rounded-Line" generation, quickly became known for their distinctive squared-off design. This robust and straightforward design replaced the rounded styles of the previous generation, appealing to a wide range of consumers, from farmers and construction workers to everyday drivers.

Key Model Years and Changes

• 1973-1976: Early models featured a more industrial aesthetic with simple grilles and interior designs.
• 1977-1980: Minor refinements, including updated grilles and interior upgrades to improve comfort.
• 1981-1987: The final phase saw significant updates, including more aerodynamic styling, enhanced engine options, and improved fuel efficiency. These later models are highly sought after by collectors.

Why Square Body Trucks Remain Popular

• Durability: Built with robust components designed for heavy-duty use.
• Simplicity: Easier to repair and maintain compared to modern vehicles.
• Classic Design: The boxy, no-nonsense look holds a unique appeal.
• Customization: Vast aftermarket support makes it easy to personalize these trucks.

Common Square Body Truck Problems

Engine Issues

• Fuel System: Fuel pumps and carburetors can be prone to failure, especially in older models. Regular maintenance is crucial.
• Ignition System: Distributors, spark plugs, and ignition modules may need replacing due to wear and tear.
• Overheating: Older cooling systems can struggle, so ensure the radiator and water pump are in good condition.

Transmission Troubles

• Automatic Transmissions: These units can experience issues like slipping or hard shifting. Regular fluid changes are essential.
• Manual Transmissions: Clutch wear and synchronizer problems are common.

Body and Chassis Concerns

• Rust: This is the most significant concern. Inspect the cab corners, bed, and frame for rust damage.
• Suspension: Leaf springs and shocks wear out over time. Upgrading suspension components can improve ride quality.
• Steering: Power steering pumps and steering boxes can leak or fail.

Electrical System Woes

• Wiring Harnesses: Age and exposure to the elements can cause wiring to degrade. Check for brittle wires and corrosion.
• Gauges: Instrument cluster gauges can become inaccurate. Electrical gremlins often stem from the dashboard.

Restoring a Square Body Truck: A Step-by-Step Guide

Assessment and Planning

• Inspection: Thoroughly assess the truck's condition, including the engine, transmission, body, and chassis. Make a detailed list of all necessary repairs.
• Budget: Determine your budget and stick to it. Restoration projects can quickly become expensive.
• Research: Research available parts and restoration techniques.

Bodywork and Paint

• Rust Repair: Address any rust issues by cutting out damaged sections and welding in new metal.
• Body Prep: Smooth out imperfections, apply body filler, and sand the body to create a smooth surface.
• Painting: Choose a durable paint and follow the manufacturer's instructions for a professional finish.

Engine and Drivetrain

• Rebuild or Replace: Decide whether to rebuild the existing engine or replace it with a crate engine. Address any transmission issues during the rebuild.
• Cooling System: Replace worn-out components, such as the radiator, water pump, and hoses.
• Brakes: Upgrade or rebuild the brakes for safety and improved stopping power.

Interior Restoration

• Upholstery: Replace worn seat covers, carpets, and headliners.
• Dashboard: Repair or replace cracked dashboards and install new gauges.
• Trim: Replace or refinish interior trim components to restore the truck's original look.

Sourcing Parts

• Online Retailers: Many online retailers specialize in square body truck parts.
• Local Auto Parts Stores: Check with local auto parts stores for common replacement parts.
• Junkyards/Wrecking Yards: Scour local junkyards for hard-to-find parts.
• Specialty Shops: Work with restoration shops that specialize in these trucks for specialized services.

Customization and Modifications

Popular Upgrades

• Engine Swaps: Install a modern V8 engine for more power and efficiency.
• Suspension Lifts: Lift the truck for a more aggressive look and improved off-road capability.
• Wheel and Tire Upgrades: Upgrade wheels and tires to enhance appearance and performance.
• Interior Customization: Upgrade the interior with modern amenities and custom upholstery.

Tips for Success

• Plan Ahead: Always plan modifications carefully and consider how they will affect other components.
• Quality Parts: Use high-quality parts to ensure reliability and durability.
• Professional Help: Don't hesitate to seek professional help for complex modifications.

Maintaining Your Square Body Truck: Essential Tips

Regular Maintenance

• Oil Changes: Perform oil changes at the recommended intervals using the proper oil type.
• Fluid Checks: Regularly check and top off fluids, including coolant, transmission fluid, and brake fluid.
• Brake Inspection: Inspect brake pads, rotors, and lines for wear and leaks.
• Tire Rotation: Rotate tires to ensure even wear.

Prevention

• Rust Prevention: Wash and wax the truck regularly to protect the paint and body.
• Storage: Store the truck indoors during the winter months to protect it from harsh weather conditions.
• Driving Habits: Avoid excessive speeds and harsh driving conditions to minimize wear and tear.

Where to Find Square Body Trucks

Online Marketplaces

• eBay Motors: A large selection of square body trucks from different sellers.
• Classic Car Websites: Websites specializing in classic cars often feature square body trucks.
• Online Forums and Social Media Groups: Find listings and connect with other enthusiasts on specialized forums and social media.

Local Auctions and Shows

• Car Auctions: Attend classic car auctions in your area for potential deals.
• Car Shows and Swap Meets: Car shows are great places to find trucks and parts.
• Local Dealers: Some classic car dealers specialize in square body trucks.

Square Body Truck Community

Online Forums

• Dedicated Forums: Many online forums focus on square body trucks, offering a wealth of information and community support.
• Social Media Groups: Numerous Facebook groups and other social media communities bring enthusiasts together.

Clubs and Events

• Local Car Clubs: Join a local car club for social events and support.
• Truck Rallies and Shows: Participate in truck rallies and shows to showcase your truck and meet other enthusiasts.

Frequently Asked Questions (FAQ)

**Q: Are square body trucks reliable?

A:** Yes, square body trucks are known for their reliability when properly maintained. Their simple design makes them easy to repair, and many parts are readily available.

**Q: What is the most common problem with square body trucks?

A:** Rust is perhaps the most significant issue, affecting the body and frame. Regular inspection and rust prevention are crucial.

**Q: What engines were available in square body trucks?

A:** Various engine options were available, including inline-sixes, small-block V8s, and big-block V8s, depending on the model year and trim level. — Davante Adams Net Worth: How The Raiders' Star Built His Fortune

**Q: How much does it cost to restore a square body truck?

A:** Restoration costs vary widely depending on the extent of the work and the quality of parts. Budget carefully, and be prepared for potential cost overruns.

**Q: Where can I find parts for my square body truck?

A:** Parts can be found online, at local auto parts stores, in junkyards, and at specialty restoration shops.

**Q: Are square body trucks good for daily driving?

A:** Yes, properly maintained square body trucks can be reliable daily drivers. Consider fuel efficiency and comfort features when choosing a model. — US Open 2025: Your Ultimate Guide

**Q: What is the best year for a square body truck?

A:** The best year depends on individual preferences and needs. The later models (1981-1987) often have more features, while earlier models may appeal to purists.

Conclusion

Square body trucks offer a unique combination of classic design, rugged durability, and ease of maintenance, making them an excellent choice for truck enthusiasts and collectors. By understanding their history, common problems, and restoration processes, you can appreciate and maintain these vintage trucks for years to come. Whether you're looking for a project truck or a reliable classic, the square body truck era offers something for everyone. — Rice Owls Vs. Houston Cougars: A Comprehensive Showdown